Hi

i am trying Ovirt 4.0 and i am getting some strange results when comparing with Xenserver

*The host machine
Intel Core i5-4440 3.10GHz running at 3093 MHz

8 Gb of RAM (1x8)

500 Gb of Disk (seagate st500dm002 7200rpm)

CentOS 7 (netinstall for the most updated and stable packages)

*How i am testing:

I choose two benchmark tools, sysbench(epel-repo on centos) and novabench(for windows guest, https://novabench.com ), then i make a clean install of xenserver and create two guests(CentOS and Windows 7 SP1)

*The Guest specs

2 cores

4 Gb of RAM

60 Gb of disk (using virtIO in a NFS storage)

Important note: only the testing guest are up on benchmark and i have installed the drivers in guest

*The Sysbench disk test(creates 10Gb of data and do the bench):

# sysbench --test=fileio --file-total-size=10G prepare
# sysbench --test=fileio --file-total-size=10G --file-test-mode=rndrw --init-rng=on --max-time=300 --max-requests=0 run

Host result:            2.9843Mb/sec

Ovirt result:           1.1561Mb/sec

Xenserver result:   2.9006Mb/sec

*The novabench test:

Ovirt result:          79Mb/s

Xenserver result:  101Mb/s